Molding apparatus.



No; 7|5,293. Patented Dec. 9, i902. .1. c. ssen. f

MULDH'IG APPARATUS.

(Application B led Mar. 28, 1962A (No Model.)

INVENTOR WITNESSES 4W? am? @s 0% JOI-IN O. REED, OF ALLEGHENY, PENNSYLVANIA.

MOLDING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 715,293, dated December 9, 1902.

Application filed March 28, 1902.

To @ZZ whom it ntcty concern:

Beit known that I, JOHN C. REED, a citizen of the United States, residing at Allegheny, in the county of Allegheny and State of Penn- Sylvania, have invented certain new and useful Improvements in Molding Apparatus; and I do hereby declare the following to he a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention has relation to molding apparatus, and particularly to molds for large articles, snch as bath-tubs.

In applications already led by me I have shown and described means and processes for utilizing two separate and distinct patterns, one to form the cheek and the other the drag or nowel part of the mold. I have also shown and described means and methods for casting bath-tubs by causing the metal to enter the mold-cavity at its lowest part through gates formed at the sides of the cavity and leading from gate-boxesabove the mold. In carrying out these processes the nowel or drag part of the mold is formed by ramming the sand through the nowel part of the flask into a pattern contained in a casing having gudgeons at the ends, the nowel part of the asks and the casing being locked together. After the sand has been sufficiently rammed the nowel part of the ask and the casing with its contained sand and pattern are lifted by a crane having chains, with hook which engages with the gudgeons at the ends of the casing and the whole turned over and lowered, so that the enlarged base of the drag part will rest on the ioor of the foundry, after which the casing and pattern are lifted olf, leaving the nowel or drag portion of the mold in a position to receive the cheek part of the mold formed by packing sand over another and distinct pattern. The casing is again reversed or overturned to bring it to its original position for the reception of sand. Owing to the Afact that in'these operations of lifting and reversing the casing it is at one time attached to and supports the weight of the nowel part of the flask and at another time is relieved of such weight, there is a shifting of the center of gravity. In other words, the Weight of metal above the gudgeons employed in overturning the structure is much greater when Serial No. 100,477` (No model.)

the drag part of the flask is attached than when the casing is overturned and detached and lifted from the drag. Hence the strncture is difficult to handle, the drag part having a tendency to swing around forcibly, thus endangering the work and leading to undesirable and injurious results. It is impracticable to overcome this difliculty where the ordinary gudgeons or trnnnions are employed, as it is impossible to locate them permanently at a point when under the two explained conditions the weight above and below will be equal.

The object of my invention is to provide expedients which will compensate for the change which takes place in the position of the center of gravity of the apparatus; and it consists in the provision of adj nstable trnnnions or gndgeons which may be shifted so as to locate pivotal points or axis of motion where required to balance the weight when the nowel part is attached as well as when it is disconnected. In the accompanying drawings, Figure lis a vertical longitudinal sectional view of a molding apparatus embodying illy-invention, and Fig. 2 an end View of the same.

A designates the casing in which is fixed a pattern adapted to receive the sand to form the nowel part of a mold.

B is the nowel part of Va iiask, consisting of the wall or base B' and the hollow part C, united to the wall B' by webs D. The wall B is iianged exteriorly at b to rest, while the sand is being rammed, upon the flange b of the casing A, the two flanges being at the time locked or clamped together.

E designates flanged castings bolted to the ends of the casing and formed with horizontal projecting portions e e, having central sockets e' e to receive the Shanks e2 c2 of the Z-shaped trnnnions e3 e3. The horizontal limbs g g of the trnnnions es e3 are shouldered and headed for the attachment of hooks on the ends of lifting-chains operated by a crane. The Shanks c2 e2 of the trnnnions are adapted to be turned in the boxes e e and are slotted at 77, h, the boxes e e being correspondingly slotted, so that when the trnnnions are adjusted to the required positions keys t" t may be inserted in the sockets to lock the trunnions in place.

IOO

will.

The position of the boxes e e and thelength of the vertical sections of the trunnions are such that when the casing A is attached to the drag or nowel part B and the trunnions adjusted, so that the limbs g g will be in the position shown in Fig. l, the weight of the structure will be about the same above as it is below, an axial line passing horizontally through the limbs g g, and it will be thus nicely balanced, so that it may be turned over easily and evenly. When the structure after having been iilled with sand is reversed and the nowel part deposited on the floor and the casing disconnected, the trunnions are reversed in position, the keys being taken out and the shanks c2 e2 turned around in their sockets, so that the aXis of motion, through the limbs g g, will be shifted to the position shown in dotted lines in Fig. l, the disconnection of the nowel having shifted the center of gravity, so that without such adjustment of the trunnions the casing when lifted from the nowel would tend to swing violently to a reversed position. When, however, the position of the trunnions is changed, the casing is balanced on its trunnions and can then be turned over easily, slowly, and at The trunnions are prevented from coming out of their sockets or moving horizontally by the smooth-necked screws or bolts, in which are inserted the ends of the shanks e2 through the blocked inner ends of the sockets e before the castings E are fastened to the casing.

Having described my invention, I claiml. In molding apparatus, the combination with the casing, or pattern-holding structure A of rotatable end trunnions having lifting necks or limbs, out of axial alinement with their Shanks, and means for adjusting and locking the trunnions in different positions.

2. The combination with the structure A constituting part of a mold-forming .apparatus,L of the end castings E bolted thereto and formed with trunnion-boxes e e, the rotatable trunnions e e having Shanks e2, and liftingarms g g out of axial alinement with each other, and means for locking the trunnions in different positions, whereby the axis of motion of the structure may be shifted to compensate for variations in the center of gravity.

3. In molding apparatus, a pattern-supporting structure A, adapted to sustain a part of a mold-forming apparatus, While the latter is being reversed in position, said structure being provided with adjustable trunnions having bearings for the attachment of liftingchains, and so constructed and arranged that the position of the bearings may be altered to balance the structure under changes in the position of its center of gravity.

In testimony whereof I affix my signature in presence of two witnesses.

' JOHN C. REED.

Witnesses:

W. CARR, J. C. LANGFITr 

